This section of the manual describes the reusable action system in Catalyst,
how such actions work,
descriptions of some existing ones,
and how to write your own.
Reusable actions are attributes on Catalyst methods that allow you to decorate your method with functions running before or after the method call.
This can be used to implement commonly used action patterns,
while still leaving you full freedom to customize them.

In this example, we expect the SayBefore action to magically populate stash with something relevant before Hello is run. In the next section we'll show you how to implement it. If you want it in a namespace other than Catalyst::Action you can prefix the action name with a '+', for instance '+Foo::SayBefore', or if you just want it under your application namespace instead, use MyAction, like MyAction('SayBefore').

This is meant to decorate end actions. It's similar in operation to Catalyst::Plugin::DefaultEnd, but allows you to decide on an action level rather than on an application level where it should be run.